On: Stupid Languages

[camus]

['10','10','10','10'].map(Number);

this is one is correct

['10','10','10','10'].map(String);

this one makes sense

['10','10','10','10'].map(Object);

i'd like somebody to explain me this one ?????????

Javascript is really difficult as soon as one try to do non trivial stuffs.

[ricardobeat → camus]

Object('abc') is the same as new String('abc'), Object(1) the same as new Number(1) - it just calls the .constructor

[iso-8859-1 → ricardobeat]

but "new Number(x)" is not equal to "Number(x)". So, it's tricky, I guess?

[ville → iso-8859-1]

Number(x) performs a type conversion to number, new Number(x) constructs a primitive wrapper object Number:

  typeof Number("10")
  //=> "number"
  typeof new Number("10")
  //=> "object"

The same applies to other wrapper objects, that is, Boolean and String.